CN104036832A - Maintaining grating with double-blade spring and fuel assembly with grating - Google Patents
Maintaining grating with double-blade spring and fuel assembly with grating Download PDFInfo
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- CN104036832A CN104036832A CN201410280399.3A CN201410280399A CN104036832A CN 104036832 A CN104036832 A CN 104036832A CN 201410280399 A CN201410280399 A CN 201410280399A CN 104036832 A CN104036832 A CN 104036832A
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- shell fragment
- blade
- spring
- maintenance grid
- fuel rod
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention discloses a maintaining grating with a double-blade spring. The maintaining grating comprises a plurality of inner strips and outer strips, wherein the plurality of inner strips are intersected to form a latticed grating structure so as to form a plurality of hollow grating units, and the outer strips are surrounded at the periphery of the grating structures and are fixed with the inner strips; the maintaining grating also comprises a plurality of springs clamped and fixed on the inner strips, each spring comprises a first spring piece and a second spring piece, one end of each first spring piece and one end of the corresponding second spring piece are fixed, the other end of each first spring piece is separated from the other end of the corresponding second spring piece, each first spring piece comprises two first blades which are arched towards the inside of the corresponding grating unit and have the elasticity, an interval is left between two adjacent blades, and two first blades commonly push against and clamp a fuel rod.
Description
Technical field
The present invention relates to nuclear reactor technology field, relate in particular to a kind of maintenance grid with double leaf spring and with the fuel assembly of this grid.
Background technology
The fuel rod of some is arranged (as: 15 * 15 or 16 * 16 etc.) and is fixed to a branch of according to certain intervals, be called reactor fuel assemblies, reactor fuel assemblies is mainly comprised of upper base, bottom nozzle, maintenance grid (also claiming mixing grillwork or grid spacer), control rod guide pipe and fuel rod.Wherein, keep grid for loading and locate fuel rod and being comprised of a plurality of interior bands and outer band, the mutually orthogonal formation of a plurality of interior bands has the latticed cell structure of a plurality of grill unit, and outer band is surrounded on outside interior band regularly.Except a few grill unit is used for arranging control rod guide pipe, an accommodating fuel rod in remaining each grill unit.
In the process of fuel assembly work, cooling medium (water) is flowed through fuel assembly continuously from lower to upper to take away the amount of heat producing in fuel rod fission reaction, the mobile meeting of cooling medium is to keeping the fuel rod in grid to produce certain impact, therefore, in order to keep the stable of fuel rod, on keeping the interior band of grid, be provided with towards the firm protruding and spring protruding out in grill unit, utilize the firm protruding rigidity to fuel rod to support with spring the elasticity of fuel rod is supported to clamp firm fuel rod.Wherein just protruding is to be pressed in interior band upper punch, and spring is engage and be welded and fixed on interior band after being shaped to separately hair fastener shape.
As shown in Figure 1, in prior art, keeping the spring using on grid is all structures of single blade, the spring of this structure has following shortcoming: 1, when clamping fuel rod, the contact area of itself and fuel rod is little, thereby cause with the contact region stress of fuel rod very greatly, easily produce the phenomenon that abrasion or fuel rod clad are caved in; 2, elasticity in the irradiation rear spring through reactor inside can diminish, thereby causes the spring in latter stage using at fuel assembly not enough to the holding force of fuel rod, and its shape is the transverse shifting of fuel limitation rod well, under the impact of current, easily cause fuel rod vibration.
In order to solve the problem of above-mentioned existence, need to provide a kind of spring all the time fuel rod to be kept the maintenance grid of firm clamping.
Summary of the invention
The object of the present invention is to provide a kind of spring all the time fuel rod to be kept the maintenance grid of firm clamping.
Another object of the present invention is to provide a kind of fuel assembly with described maintenance grid.
To achieve these goals, the invention provides a kind of maintenance grid with double leaf spring, described maintenance grid comprises a plurality of interior bands and outer band, a plurality of described interior bands intersect the grill unit that is latticed cell structure and forms a plurality of hollows mutually, described outer band is around in the peripheral of described cell structure and fixes with described interior band, described maintenance grid also comprises a plurality of springs that grip to described interior band, described spring comprises the first shell fragment and the second shell fragment, one end of one end of described the first shell fragment and described the second shell fragment is fixed, the other end of the other end of described the first shell fragment and described the second shell fragment is separated from one another, described the first shell fragment comprises that two arch upward and have flexible the first blade in described grill unit, described in two, between the first blade, there is interval, and described in two, fuel rod is supported and clamped to the first blade jointly.
Compared with prior art, because the present invention is provided with two described the first blades on described first shell fragment of described spring, described in two, fuel rod is supported and clamped to the first blade jointly, therefore the contact area of described spring and fuel rod is larger, when clamping fuel rod, its holding force is shared by the first blade described in two, so the stress in fuel rod clad is less, is difficult for the phenomenon that generation abrasion or fuel rod clad are caved in.In addition, after the irradiation through reactor inside, even if the elasticity of described spring diminishes, but owing to there being two described the first blades that holding force is provided simultaneously, so still can provide enough holding forces to fuel rod the latter stage of using at fuel assembly.Meanwhile, described in two, the transverse shifting of the good fuel limitation rod of the clamp position of the first blade energy, prevents that fuel rod from vibrating under the impact of current, guarantees the stable of reactor.
Preferably, on described interior band, offer mounting hole, described the first shell fragment or the second shell fragment from described mounting hole through and described the first shell fragment and the second shell fragment lay respectively at the both sides of described interior band.On described interior band, described mounting hole is set, can quickly and easily described spring fitting be clamped on described interior band.
Preferably, on described interior band, offer pilot hole, described the second shell fragment is formed with positioning convex to described the first shell fragment with protruding out, and described positioning convex snaps in described pilot hole.Utilize coordinating of described positioning convex and described pilot hole, described spring can be navigated to preposition on described interior band.
Particularly, described the second shell fragment comprises the spaced spacer of two tools, described in two, on spacer, form respectively at least two described in positioning convex, on described interior band, correspondence is offered a plurality of described pilot holes.Form respectively a plurality of described positioning convex and a plurality of described pilot hole, be more conducive to the location of described spring on described interior band, can limit well the displacement of described spring in all directions.
Preferably, described in two, between the first blade, be provided with web member, the two ends of described web member be individually fixed in two described in the first blade.The effect of described web member is the lateral stiffness of strengthening described the first shell fragment, prevent two described in the first blade when being supported mutually away from and fuel rod is lost to clamping action.
Preferably, described the first blade is curved.Arcuate structure can utilize himself elasticity to strengthen holding force better.
Preferably, described the first shell fragment also comprises stator, and described stator is fixedly connected on the lower end of the first blade described in two.The effect of described stator is identical with described web member.
Preferably, described the second shell fragment comprises that two arch upward and have flexible the second blade in described grill unit, have interval and be oppositely arranged with the first blade described in two respectively, and described in two, fuel rod is supported and clamped to the second blade jointly described in two between the second blade.Described the second blade that described the second shell fragment setting is identical with described the first blade, the both sides of described spring can be clamped fuel rod, the quantity that therefore described spring arranges can be still less, and the position arranging on described maintenance grid is also more balanced, and then the structure of whole described maintenance grid is more tended to be balanced.
Particularly, described interior band or described outer band have formed just protrudingly to protruding out in described grill unit, and described just protruding and described the first blade or the second blade are oppositely arranged.Utilize the described just protruding rigidity to fuel rod to support with described the first blade or the second blade the elasticity of fuel rod is supported, better firm fuel rod.
The present invention also provides a kind of fuel assembly, comprise base, bottom nozzle, a plurality of control rod guide pipe, a plurality of fuel rod and a plurality of described maintenance grid, a plurality of described maintenance grids are arranged along the vertical direction, a plurality of described fuel rods and control rod guide pipe are inserted in respectively described maintenance grid, the upper end of described control rod guide pipe and described upper base are fixed, and the lower end of described control rod guide pipe and described bottom nozzle are fixed.
Compared with prior art, owing to having used described spring on the described maintenance grid in fuel assembly of the present invention, therefore fuel rod is difficult for the phenomenon that generation is denuded or fuel rod clad is caved in, and described maintenance grid can fuel limitation rod transverse shifting, prevent that fuel rod from vibrating under the impact of current, even the flexibility decrease of spring, still can guarantee enough holding forces by the common clamping of two described the first blades described in the latter stage of using at fuel assembly.
Accompanying drawing explanation
Fig. 1 is the stereographic map that keeps the spring on grid in prior art.
Fig. 2 is that the structure of fuel assembly of the present invention forms schematic diagram.
Fig. 3 is the part floor map that the present invention keeps screen work.
Fig. 4 is the stereographic map of first embodiment of the invention medi-spring.
Fig. 5 is first embodiment of the invention medi-spring side view.
Fig. 6 be in first embodiment of the invention in the schematic diagram of pilot hole and mounting hole on band.
The clamp position schematic diagram of Fig. 7 first embodiment of the invention medi-spring to fuel rod.
Fig. 8 is the stereographic map of second embodiment of the invention medi-spring.
Fig. 9 is the stereographic map of third embodiment of the invention medi-spring.
Figure 10 is the stereographic map of another angle of third embodiment of the invention medi-spring.
Figure 11 is the side view of third embodiment of the invention medi-spring.
Figure 12 is that third embodiment of the invention medi-spring grips schematic diagram on interior band.
Figure 13 is the stereographic map of fourth embodiment of the invention medi-spring.
Embodiment
Below in conjunction with the Figure of description providing, preferred embodiment of the present invention is made to description.
As shown in Figure 2, the present invention discloses a kind of fuel assembly, comprise base 1, bottom nozzle 2, a plurality of control rod guide pipe 3, a plurality of fuel rod 4 and a plurality of maintenance grid 5, a plurality of described maintenance grids 5 along the vertical direction (described fuel rod 4 axially) are arranged, a plurality of described control rod guide pipes 3 and fuel rod 4 are inserted in respectively described maintenance grid 5, the upper end of described control rod guide pipe 3 and described upper base 1 are fixing, and the lower end of described control rod guide pipe 3 and described bottom nozzle 2 are fixing.
Refer to Fig. 3, described maintenance grid 5 in fuel assembly of the present invention is a kind of maintenance grids 5 with double leaf spring 6, described maintenance grid 5 comprises a plurality of interior bands 51 and outer band 52, the mutual grill unit 53 that is latticed cell structure and forms a plurality of hollows of intersecting of a plurality of described interior bands 51, described outer band 52 is around in the peripheral of described cell structure fixing with described interior band 51.Described control rod guide pipe 3 and fuel rod 4 are exactly to be plugged in described grill unit 53, and particularly, the several described grill unit 53 of minority is for holding described control rod guide pipe 3, and the described grill unit 53 of other majorities is interior, have respectively a fuel rod 4.
Described maintenance grid 5 also comprises a plurality of springs 6 as shown in Figures 4 and 5, described spring 6 is clamped on described interior band 51 and is fixed on interior band 51, and the effect of described spring 6 is that fuel rod 4 is clamped fuel rod 4 can be firmly positioned in described grill unit 53.
Described spring 6 comprises the first shell fragment 61 and second shell fragment 62 of the both sides that lay respectively at described interior band 51, the upper end of the upper end of described the first shell fragment 61 and described the second shell fragment 62 is fixed, described the first shell fragment 61 is free end with the lower end of described the second shell fragment 62, and the free end of the free end of described the first shell fragment 61 and the second shell fragment 62 is separated from one another.In the present embodiment, the free end of the free end of described the first shell fragment 61 and the second shell fragment 62 is fixed together by welding to fit after on described interior band 51 at clamping position, and described the first shell fragment 61 and the second shell fragment 62 that therefore in Figure of description, show are lower end state bonded to each other.Described the first shell fragment 61 and the second shell fragment 62 can be integrated one-piece constructions, can be also after moulding, by means such as welding, to be fixed together separately respectively, in the present embodiment, adopt the former.
Described the first shell fragment 61 comprises two, and described interior band 51 is rear has interval to arching upward in described grill unit 53 and having 610, the first blade described in flexible the first blade 610, two being held on, and described the first blade 610 is curved.In actual enforcement, described in two, the first blade 610 is by the centre position at described the first shell fragment 61, to cut and remove material to form, this end that continues up to described the first shell fragment 61 that cuts, makes the interval between the first blade 610 described in two be open.The structure of described the second shell fragment 62 is identical with the structure of described the first shell fragment 61: described the second shell fragment 62 is included in to be held on and in the backward described grill unit 53 of described interior band 51, arches upward and have flexible the second blade 620, described in two, 620, the second blade has interval, and described the second blade 620 is also the arc identical with described the first blade 610.Described in two, described in the first blade 610 and two, the second blade 620 lays respectively at the both sides of described interior band 51.Because the structure of described the second shell fragment 62 is identical with the structure of described the first shell fragment 61, therefore described in two, described in the first blade 610 and two, the second blade 620 is to be oppositely arranged, and the free end of the free end of described the first blade 610 and described the second blade 620 can be bonded to each other after being held on described interior band 51.
Described spring 6 makes to guarantee that by the good material of distortion recovery capability described the first blade 610 and the second blade 620 structurally have enough elasticity, utilize the arcuate structure of described the first blade 610 and the second blade 620 simultaneously, can guarantee fuel rod 4 to form stable supporting.
As shown in Figure 6, on described interior band 51, suitable position offers mounting hole 510, and the size of described mounting hole 510 can be held described the first shell fragment 61 or the second shell fragment 62 passes.When described spring 6 is installed, described the first shell fragment 61 or the second shell fragment 62 are passed from described mounting hole 510, then press the free end of described the first shell fragment 61 and the second shell fragment 62, make both sides that described the first shell fragment 61 and the second shell fragment 62 lay respectively at described interior band 51 to clamp described interior band 51.On described interior band 51, described mounting hole 510 is set, can quickly and easily described spring 6 is installed and is clamped on described interior band 51.
As shown in Figure 7, when described fuel rod 4 inserts after described grill unit 53, described fuel rod 4 is positioned at the centre position of the first blade 610 described in two (or second blade 620) just, described in two, the first blade 610 contacts fuel rod 4 simultaneously and utilizes its arc to arch upward the distortion producing and fuel rod 4 is produced to elasticity supports, simultaneously, owing to having interval between the first blade 610 described in two, the side that therefore described in two, the first blade 610 is relative can form clamping to fuel rod 4, firm fuel rod 4 again.
Review Fig. 3, on described interior band 51 or described outer band 52, also to protruding out in described grill unit 53, formed just protruding 54, described spring 6 adopts such set-up mode on described cell structure: described in one, grill unit 53 has four sidewalls, spring described in two 6 is arranged on wherein on two adjacent sidewalls that join, and the setting party of spring 6 is to not limitting, both can be that described first blade 610 of two described springs 6 is simultaneously in this grill unit 53, also can be that described first blade 610 of a described spring 6 and described second blade 620 of spring 6 described in another are simultaneously in this grill unit 53, and describedly just protruding 54 be arranged on all the other two the adjacent sidewalls that join of this grill unit 53, and just protruding 54 be oppositely arranged with described the first blade 610 or the second blade 620.Utilize the described just rigidity of protruding 54 pairs of fuel rods 4 to support with the elasticity of described the first blade 610 or 620 pairs of fuel rods 4 of the second blade and support, better firm fuel rod 4.
Certainly, described spring 6 and just protruding 54 set-up mode can be also the set-up mode of routine other this areas in.
Compared with prior art, because the present invention is provided with two described the first blades 610 on described first shell fragment 61 of described spring 6, described in two, fuel rod 4 is supported and clamped to the first blade 610 jointly, therefore described spring 6 is larger with the contact area of fuel rod 4, when clamping fuel rod 4, its holding force is shared by the first blade 610 described in two, so the stress on fuel rod 4 involucrums is less, is difficult for producing the phenomenon of abrasion or fuel rod 4 clad collapses.In addition, after the irradiation through reactor inside, even if the elasticity of described spring 6 diminishes, but owing to there being two described the first blades 610 that holding force is provided simultaneously, so still can provide enough holding forces to fuel rod 4 latter stage of using at fuel assembly.Meanwhile, described in two, the transverse shifting of the good fuel limitation rod 4 of the clamp structure of the first blade 610 energy, prevents that fuel rod 4 from vibrating under the impact of current, guarantees the stable of reactor.Moreover, on described first shell fragment 61 of described spring 6 both sides and the second shell fragment 62, be provided with the structure that can clamp fuel rod 4, the quantity that therefore described spring 6 arranges can be still less, and the position arranging on described cell structure is also more balanced, and then the structure of whole described maintenance grid 5 is more tended to be balanced.
As shown in Figure 8, in second embodiment of the present invention, spring 6 ' two described in be provided with web member 7 between the first blade 610, the two ends of described web member 7 be individually fixed in two described in the first blade 610, described web member 7 forms a plane or curved surface and is covered in the interval between the first blade 610 described in two completely, described web member 7 preferably adopts soft and has certain flexible material and make, thereby can not hinder the clamping of 610 pairs of described fuel rods 4 of the first blade described in two.The effect of described web member 7 is lateral stiffnesses of strengthening described the first shell fragment 61, prevent two described in the first blade 610 when being supported mutually away from excessively fuel rod 4 being lost to clamping action.In other embodiment, described web member 7 also can only be connected in the part position between the first blade 610 described in two, not exclusively covers the interval between the first blade 610 described in two.
With reference to Fig. 9 to Figure 11, in the 3rd embodiment of the present invention, the structure of spring 6 〞 is different from the first embodiment, concrete, described spring 6 〞 comprise the first shell fragment 61 and the second shell fragment 63, the upper end of described the first shell fragment 61 is also fixedly connected with the upper end of the second shell fragment 63, and lower end is also free end separated from one another.Wherein said the first shell fragment 61 comprises two described the first blades 610 with identical in the first embodiment, described the second shell fragment 63 comprises the spaced spacer 630 of two tools, described in two spacer 630 respectively with the corresponding setting of the first blade 610 described in two, described in each, on spacer 630, to described the first shell fragment 61, be formed with two positioning convex 630a with protruding out.
Review Fig. 6, on described interior band 51, also offer six 511, six described pilot hole 511 apportions of pilot hole that are positioned at described mounting hole 510 belows become two rows and the described pilot hole 511 of every row corresponding with the described positioning convex 630a on described spacer 630.Again in conjunction with Figure 12, when described the first shell fragment 61 or the second shell fragment 63 through described mounting hole 510 and be pressed mutually near after, described on described spacer 630 two, positioning convex 630a snaps in respectively in upper two the described pilot holes 511 in same row, and the free end of described spacer 630 is fitted and is welded and fixed with the free end of described the first blade 610 in the described pilot hole 511 of extreme lower position.Utilize coordinating of described positioning convex 630a and described pilot hole 511, described spring 6 can be navigated to preposition on described interior band 51, and limit described spring 6 in the displacement in all directions between starting to be welded and fixed.
As shown in figure 13, in the 4th embodiment of the present invention, the structural similarity of the structure of spring 8 and the 3rd embodiment medi-spring 6 〞, comprise the first shell fragment 81 and the second shell fragment 82, described the first shell fragment 81 comprises two the first blades 810, described the second shell fragment 82 comprises two spacers 820, and is fixedly connected with a stator 83 in the lower end of the first blade 810 described in two.In other words, the gap of offering on the first shell fragment 81 described in the present embodiment does not extend to the lower end of described the first shell fragment 81, therefore make to form two described in interval between the first blade 810 be closed and be different from open in the first embodiment.Being provided with of described stator 83 is beneficial to the lateral stiffness that strengthens the first blade 810 described in two, and its effect is similar to the described web member 7 in the second embodiment.
Above disclosed is only preferred embodiments of the present invention, its effect is facilitate those skilled in the art to understand and implement according to this, certainly can not limit with this interest field of the present invention, therefore the equivalent variations of doing according to the present patent application the scope of the claims, still belongs to the scope that the present invention is contained.
Claims (10)
1. the maintenance grid with double leaf spring, described maintenance grid comprises a plurality of interior bands and outer band, a plurality of described interior bands intersect the grill unit that is latticed cell structure and forms a plurality of hollows mutually, described outer band is around in the peripheral of described cell structure and fixes with described interior band, it is characterized in that: described maintenance grid also comprises a plurality of springs that grip to described interior band, described spring comprises the first shell fragment and the second shell fragment, one end of one end of described the first shell fragment and described the second shell fragment is fixed, the other end of the other end of described the first shell fragment and described the second shell fragment is separated from one another, described the first shell fragment comprises that two arch upward and have flexible the first blade in described grill unit, described in two, between the first blade, there is interval, and described in two, fuel rod is supported and clamped to the first blade jointly.
2. maintenance grid as claimed in claim 1, is characterized in that: on described interior band, offer mounting hole, described the first shell fragment or the second shell fragment from described mounting hole through and described the first shell fragment and the second shell fragment lay respectively at the both sides of described interior band.
3. maintenance grid as claimed in claim 1, is characterized in that: on described interior band, offer pilot hole, described the second shell fragment is formed with positioning convex to described the first shell fragment with protruding out, and described positioning convex snaps in described pilot hole.
4. maintenance grid as claimed in claim 3, is characterized in that: described the second shell fragment comprises the spaced spacer of two tools, described in two, on spacer, form respectively at least two described in positioning convex, on described interior band, correspondence is offered a plurality of described pilot holes.
5. maintenance grid as claimed in claim 1, is characterized in that: described in two, between the first blade, be provided with web member, the two ends of described web member be individually fixed in two described in the first blade.
6. maintenance grid as claimed in claim 1, is characterized in that: described the first blade is curved.
7. maintenance grid as claimed in claim 1, is characterized in that: described the first shell fragment also comprises stator, and described stator is fixedly connected on the lower end of the first blade described in two.
8. maintenance grid as claimed in claim 1, it is characterized in that: described the second shell fragment comprises that two arch upward and have flexible the second blade in described grill unit, described in two, between the second blade, there is interval and be oppositely arranged with the first blade described in two respectively, and described in two, fuel rod is supported and clamped to the second blade jointly.
9. maintenance grid as claimed in claim 8, is characterized in that: described interior band or described outer band have formed just protrudingly to protruding out in described grill unit, and described just protruding and described the first blade or the second blade are oppositely arranged.
10. a fuel assembly, comprise base, bottom nozzle, a plurality of maintenance grid, a plurality of fuel rod and a plurality of control rod guide pipe, a plurality of described maintenance grids are arranged along the vertical direction, a plurality of described fuel rods and control rod guide pipe are inserted in respectively described maintenance grid, the upper end of described control rod guide pipe and described upper base are fixed, the lower end of described control rod guide pipe and described bottom nozzle are fixed, and it is characterized in that: described maintenance grid is as described in claim 1-9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410280399.3A CN104036832A (en) | 2014-06-20 | 2014-06-20 | Maintaining grating with double-blade spring and fuel assembly with grating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410280399.3A CN104036832A (en) | 2014-06-20 | 2014-06-20 | Maintaining grating with double-blade spring and fuel assembly with grating |
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| CN104036832A true CN104036832A (en) | 2014-09-10 |
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| CN201410280399.3A Pending CN104036832A (en) | 2014-06-20 | 2014-06-20 | Maintaining grating with double-blade spring and fuel assembly with grating |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105023618A (en) * | 2015-07-06 | 2015-11-04 | 中科华核电技术研究院有限公司 | Independent spring, retaining grating and nuclear fuel assembly |
| CN105761764A (en) * | 2016-04-29 | 2016-07-13 | 中广核研究院有限公司 | Protector and method for loading fuel rods into fuel assembly |
| CN106531231A (en) * | 2016-11-30 | 2017-03-22 | 中广核研究院有限公司 | Fuel assembly and clamping device thereof |
| CN109920561A (en) * | 2019-02-27 | 2019-06-21 | 广东核电合营有限公司 | Fuel assembly and grid spacer |
| CN109935367A (en) * | 2017-12-19 | 2019-06-25 | 中国原子能科学研究院 | A kind of spacer grid of fuel assembly and fuel assembly of band buckle |
| CN110580963A (en) * | 2019-09-09 | 2019-12-17 | 中国船舶重工集团公司第七一九研究所 | Buffer mechanism for spent fuel storage grillwork in marine environment |
| CN112697408A (en) * | 2020-12-09 | 2021-04-23 | 岭东核电有限公司 | Spring piece irradiation relaxation test clamping device for commercial reactor |
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| CN105023618B (en) * | 2015-07-06 | 2017-12-01 | 中广核研究院有限公司 | A kind of independent spring, keep grid and nuclear fuel assembly |
| CN105761764A (en) * | 2016-04-29 | 2016-07-13 | 中广核研究院有限公司 | Protector and method for loading fuel rods into fuel assembly |
| CN106531231A (en) * | 2016-11-30 | 2017-03-22 | 中广核研究院有限公司 | Fuel assembly and clamping device thereof |
| CN106531231B (en) * | 2016-11-30 | 2018-05-22 | 中广核研究院有限公司 | Fuel assembly and its clamping device |
| CN109935367A (en) * | 2017-12-19 | 2019-06-25 | 中国原子能科学研究院 | A kind of spacer grid of fuel assembly and fuel assembly of band buckle |
| CN109920561A (en) * | 2019-02-27 | 2019-06-21 | 广东核电合营有限公司 | Fuel assembly and grid spacer |
| CN109920561B (en) * | 2019-02-27 | 2020-09-29 | 广东核电合营有限公司 | Fuel assembly and location grillwork |
| CN110580963A (en) * | 2019-09-09 | 2019-12-17 | 中国船舶重工集团公司第七一九研究所 | Buffer mechanism for spent fuel storage grillwork in marine environment |
| CN110580963B (en) * | 2019-09-09 | 2022-03-11 | 中国船舶重工集团公司第七一九研究所 | Buffer mechanism for spent fuel storage grillwork in marine environment |
| CN112697408A (en) * | 2020-12-09 | 2021-04-23 | 岭东核电有限公司 | Spring piece irradiation relaxation test clamping device for commercial reactor |
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